How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?

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One trick you can use to increase the number of concurrent connections is to host your images from a different sub domain. These will be treated as separate requests, each domain is what will be limited to the concurrent maximum.

IE6, IE7 – have a limit of two. IE8 is 6 if you have a broadband – 2 (if it’s a dial up).

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